Process for the preparation of surface treated mineral filler products and uses of same
a technology of surface treatment and filler, which is applied in the direction of synthetic resin layered products, chemistry apparatus and processes, layered products, etc., can solve the problems of reducing the tensile and tear strength of such a film, the difficulty of preparing a polymer product, and the degradation of the quality of the final polymer product containing such mineral filler
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example 1
Comparative Example
[0139]Example 1 refers to the treatment of a wet ground and spray dried marble with a 1:1 mixture of stearic acid and palmitic acid at a treatment temperature of about 130° C. and the subsequent treatment with polydimethylsiloxane.
[0140]500 g of a dry ground, followed by wet ground and spray dried marble from Carrara, Italy, wet ground at 25 wt.-% in tap water in a horizontal ball mill (Dynomill 1.4 litre volume) and spray dried, featuring a d50 of approximately 1.6 microns, a specific surface area of 4.1 m2 / g and a humidity of 0.06 wt.-% was added to an MTI Mixer and the mixing was activated at 3000 rpm. Thereafter a 1:1 mixture (by weight) of dry stearic acid powder and dry palmitic acid powder at room temperature was introduced to the mixer in a quantity so as to obtain the mg of treatment agent per m2 of marble indicated in Table 1, and the mixer contents were heated to 130° C. The contents of the mixer were mixed at 130° C. under a stirring speed of 3000 rpm ...
example 2
Example of the Invention
[0142]Example 2 refers to the treatment of a wet ground and spray dried marble with heptanal at a treatment temperature of about 80° C.
[0143]500 g of a wet ground and spray dried marble from Carrara, Italy, wet ground at 25 wt.-% in tap water in a horizontal ball mill (Dynomill) and spray dried featuring a d50 of approximately 1.6 microns, a specific surface area of 4.1 m2 / g and a humidity of 0.06 wt.-% was added to an MTI Mixer and the mixing was activated at 3000 rpm. Thereafter heptanal (Aldrich W254002) was introduced to the mixer in a quantity so as to obtain the mg of treatment agent per m2 of marble indicated in Table 1, and the mixer contents were heated to 80° C. The contents of the mixer were mixed at 80° C. under a stirring speed of 3000 rpm for a period of 10 minutes.
[0144]The product thus obtained was thereafter analysed; the results are presented in Table 1.
example 3
Example of the Invention
[0145]Example 3 refers to the treatment of a wet ground and spray dried marble with octanal at a treatment temperature of about 80° C.
[0146]500 g of a dry ground, followed by wet ground and spray dried marble from Carrara, Italy, wet ground at 25 wt.-% in tap water in a horizontal ball mill (Dynomill) and spray dried featuring a d50 of approximately 1.6 microns, a specific surface area of 4.1 m2 / g and a humidity of 0.05 wt.-% was added to an MTI Mixer and the mixing was activated at 3000 rpm. Thereafter octanal (Aldrich W279714) was introduced to the mixer in a quantity so as to obtain the mg of treatment agent per m2 of marble indicated in Table 1, and the mixer contents were heated to 80° C. The contents of the mixer were mixed at 80° C. under a stirring speed of 3000 rpm for a period of 10 minutes.
[0147]The product thus obtained was thereafter analysed; the results are presented in Table 1.
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Abstract
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